The thing about Temp control is that unless you go too high and burn it out, the wattage is about how fast the coil heats up.
I find that the difference between going higher as opposed to a mid-range setting is that I found that my coils would go bad faster at the higher settings... too low and you time out the device (10 second safety) before it vapes properly.
The good thing about the Pico, is that it's part of the Melo family (using the same coils) which.. there is a HUGE selection from other brands that you can try out...the coils are the same as for the Atlantis, a few Vaperasson, Herakles, etc.
I've settled on the Vaperasso coils (Ceramic) which are very nice, and once dead, I take them apart and rebuild them... (ends up costing pennies to rebuild)
At this point, my rebuilds are about the all we use at my house.